If you're concerned about keeping your photos private on Facebook:
A feature for accessing private Facebook photos! Here are some potential concepts: private facebook photos
If a friend posts a photo and tags you, but their privacy settings are looser (e.g., “Public” or “Friends of Friends”), that image may appear in places you didn’t expect — even if your own profile is locked down. If you're concerned about keeping your photos private
Over the years, Facebook has suffered massive data leaks (e.g., the 2019 exposure of 419 million user records, including phone numbers and some private photo metadata). Additionally, quiz apps or malicious browser extensions you authorize can request access to your photos. “Public” or “Friends of Friends”)